Ysgrifenu, v. to write, to pen
Ysgrifenydd, n. a scribe, a writer
Ysgnfiad, n. a writing
Ysgrifo, v. to notch; to write
Ysgrifwas, n. a clerk
Ysgrogell, n. a draw bridge
Ysgrubliad, Ysgrubl, n. a beast, a brute
Ysgrud, n. a frame; a skeleton
Ysgrwd, n. a carcase
Ysgrwth, n. a heap, a bulk